 # Two coplanar and concentric circular loops of wire carry currents of I 1 = 5.00 A and I 2 = 3.00 A in opposite directions as in Figure P19.65. (a) If r 1 , = 12.0 cm and r 2 = 9.00 cm, what are (a) the magnitude and (b) the direction of the net magnetic field at the center of the two loops? (c) Let r 1 , remain fixed at 12.0 cm and let r 2 be a variable. Determine the value of r 2 such that the net field at the center of the loop is zero. Figure P19.65 ### College Physics

11th Edition
Raymond A. Serway + 1 other
Publisher: Cengage Learning
ISBN: 9781305952300 ### College Physics

11th Edition
Raymond A. Serway + 1 other
Publisher: Cengage Learning
ISBN: 9781305952300

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Chapter 19, Problem 65AP
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